Francis is, as you mentioned a murderous sociopath. I think more than anything else, it shows to the viewer the face of the corporate democrat and how they've been in cahoots with the republicans, under the guise of bi-partisanship, to fleece the peasants and loot the treasury. Recall that Francis does not seek money, but power. And true power is in the words of a lie. To lie to the public, to ask for children to die for your war, for taxes to be spent for a criminal enterprise, to promise a better life or afterlife, all while lying with intent.